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Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

tomshardware.com

131–140 of 182 posts

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#132
post #115

Earlier quoted context omitted.

>A bunch of BLE chips are also WiFi capable, so not ruling out that someone compromised the firmware to enable WiFi functionality The ESP32 is now used as a general-purposed chip even in applications where an 8-bit MCU would have been enough. A remotely exploitable vulnerability in the ESP32/SDK could have large-scale consequences.

Leaves open the question of how they joined the network - WiFi passwords and such. Maybe stolen from the phones/laptops and then sent to the device as part of the exploit?

I could imagine there’s a lot of toothbrushes near unsecured wifi hotspots. (Hotels, in backpacks of travellers in a cafe, a demo unit in a store) Could be as simple as polling continuously till one allows the device to phone home.

This does seem to be a debunked story though.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#133
post #99

This article is strange & many details are lacking. All the big smart toothbrushes use BLE and are not WiFi-connected. Tried to fact-check the article, but nothing. A bunch of BLE chips are also WiFi capable, so not ruling out that someone compromised the firmware to enable WiFi functionality, but I wonder how they were able to connect to WiFi to trigger a botnet in the first place. Quite skeptical of this article, w…

>A bunch of BLE chips are also WiFi capable, so not ruling out that someone compromised the firmware to enable WiFi functionality The ESP32 is now used as a general-purposed chip even in applications where an 8-bit MCU would have been enough. A remotely exploitable vulnerability in the ESP32/SDK could have large-scale consequences.

The only way to load firmware to consumer esp platforms is usually via mobile apps… so, someone with privileged access to consumer’s apps, or the supply chain, used that access to load bespoke firmware to toothbrushes.. highly doubtful.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#134
post #70

Earlier quoted context omitted.

I'm reminded of this that I read a few days ago: Home assistant picked up my neighbours Bluetooth toothbrush and now I can see when they brush their teeth. https://old.reddit.com/r/homeassistant/comments/1306pcw/home...

Send them a message if they miss a brushing.

"You shouldn't stay up that late you know"

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#135
post #99

This article is strange & many details are lacking. All the big smart toothbrushes use BLE and are not WiFi-connected. Tried to fact-check the article, but nothing. A bunch of BLE chips are also WiFi capable, so not ruling out that someone compromised the firmware to enable WiFi functionality, but I wonder how they were able to connect to WiFi to trigger a botnet in the first place. Quite skeptical of this article, w…

I tried to fact check it also. They talk about a "java-based" os that could have been the cause.

I know java me was a thing and there are micro jvm that can run on microcontrollers but still, it does not add up.

I think a DDoS attack happened (happens all the time) and security "experts" mentioned that these things could come from anywhere, even toothbrush, and the details got lost in translation / used for click bait.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#136
post #40

Earlier quoted context omitted.

The call if of course on device owners, and not device manufacturers whose responsibility it truly is to manufacture secure devices.

100% agree, but I have to wonder how much of the problem is that the cost of security is: A. Not mandated B. Increases cost of the product At what point would people just prefer a regular toothbrush if a smart one doesn't provide enough utility to justify the cost? This isn't specific to toothbrushes, but I wonder what products or services wouldn't exist if they were made to be secure (or safe/ethical/sustainable/etc…

Of course it's because security is not mandated. In the past, and in the present, there are many companies who are willing to kill people for the sake of profits, if they can get away with it legally.

IMHO, any commercial violations of human rights, like privacy, should have criminal penalties.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#137
post #87

Earlier quoted context omitted.

Ah ok, so we are talking about dumb old methods. I thought it was something like the fancy APIs that are all the rage these days.

There was a brief window when people knew that if they used non-HTTP protocols, then malicious webpages couldn't talk to it. But now even "native" apps are web apps, and IoT devices all use web APIs too. They can be locked down through CORS etc., but it's easier for devs to set `Access-Control-Allow-Origin: *` and worry about it "later".

In most cases `Access-Control-Allow-Origin: ` is actually a decent policy. It importantly blocks cross-site credentials. So as long as your API has any* authentication it should prevent it.

The real mistake is mirroring the Origin header from the request in the `Access-Control-Allow-Origin` response header which allows credentials (unless you add other headers)

Of course this all relies on you not accepting form posts without auth.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#138
post #99

This article is strange & many details are lacking. All the big smart toothbrushes use BLE and are not WiFi-connected. Tried to fact-check the article, but nothing. A bunch of BLE chips are also WiFi capable, so not ruling out that someone compromised the firmware to enable WiFi functionality, but I wonder how they were able to connect to WiFi to trigger a botnet in the first place. Quite skeptical of this article, w…

It's not something that actually happened. It's just some bullshit that's gone viral. https://cyberplace.social/@GossiTheDog/111886558855943676

That toot references https://archive.is/2024.01.30-203406/https://www.luzernerzei... which attributes the story to Stefan Züger from the Swiss branch of Fortinet and claims it to be an actual event.

I don't see a mention of "NoName Ddosia".

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#139

Earlier quoted context omitted.

You're lacking in imagination, and maybe the conceptual idea of "sensor fusion". Multiple seemingly innocuous data streams in isolation can be combined to create sensors you wouldn't have imagined

Do you understand what data is available in a smart air purifier? Please, explain exactly what sensor fusion would get you actionable data out of the PM2.5 sensor and "gas sensor" in a Philips smart air purifier.

At a guess; if able to monitor over a period of time (e.g. pick up data from a parked car), a potential burglar can see when there is activity and figure what times of the day house occupants are normally at home.

Re: Three million malware-infected smart toothbrushes used in Swiss DDoS attacks

#140

Earlier quoted context omitted.

You're lacking in imagination, and maybe the conceptual idea of "sensor fusion". Multiple seemingly innocuous data streams in isolation can be combined to create sensors you wouldn't have imagined

Do you understand what data is available in a smart air purifier? Please, explain exactly what sensor fusion would get you actionable data out of the PM2.5 sensor and "gas sensor" in a Philips smart air purifier.

Maybe increased CO2 on Tuesday afternoons will tip off that the wife is cheating?

It's not even far fetched, smart watches reporting physical actively at unexpected hours have revealed infidelity in the past.

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